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Product Warranties (Tables)
 3 Months Ended
Mar. 30, 2019
Product Warranties Disclosures [Abstract]  
Activity Associated with Warranty Obligations The following table summarizes when these estimated warranty issues are expected to be paid (in thousands):
 
March 30,
2019
 
December 29,
2018
Current - in the next twelve months
$
9,355

 
$
9,455

Long-term - beyond one year
6,156

 
5,995

 
$
15,511

 
$
15,450

Activity associated with warranty obligations was as follows (in thousands):
 
Three Months Ended
 
March 30,
2019
 
March 31,
2018
Balance at beginning of period
$
15,450

 
$
15,388

Accruals for warranties issued during period
5,718

 
5,992

Adjustments related to pre-existing warranties
89

 
68

Warranty issues resolved during the period
(5,746
)
 
(6,010
)
Balance at end of period
$
15,511

 
$
15,438